The Asia temperature desk: what Japanese and Australian weather means for power demand
The pattern Japan reads Heat Surge this run: gwCDD 15d anomaly +14.6 >= +10.0; Nino3.4 +2.00 >= 0.5 (El Nino bias). Australia reads Benign: No tripwire cleared; AU degree-day path tracks within normal variability.
🇯🇵 Japan
JEPX / JKM, showing CDD this run (JEPX / JKM news →)| Condition | Now | Trips at | Gap |
|---|---|---|---|
| Nino3.4 anomaly (El Nino bias) | 2.0 | 0.5 | 1.5 |
| gwCDD 15d vs normal (JP basket) | 14.6 | 10.0 | 4.6 |
SetupTokyo's cooling demand surge reflects El Niño-enhanced Pacific High ridging, locking in humid maritime flow and blocking cooler northerlies; the HEAT_SURGE regime has pushed the 15-day CDD anomaly to +29.3 above normal. Nino3.4 at +2.00 reinforces warm SST advection across the archipelago, while positive SAM (+2.79) keeps Southern Ocean systems well south of Japan's latitude.
EvolutionCDD15 climbed from 134.8 to 159.85 against a normal of 130.54, amplifying the anomaly and confirming the heat surge is intensifying rather than plateauing.
The read (direction and mechanism only; no price targets)
Tokyo CDD +11.0 vs normal. Mechanism: aircon load. JEPX Tokyo price-sensitive; JKM direction stays hedged (one JP area alone does not carry a national LNG-demand signal)
SetupA Pacific High ridge amplified by El Niño teleconnections is driving the HEAT_SURGE regime across Chubu, with CDD15 running 38.3 above normal at 168.55. The positive SAM (+2.79) reinforces poleward jet displacement, sustaining anomalous warmth across central Japan.
EvolutionRun-to-run CDD15 surged from 134.1 to 168.55, widening the anomaly as the pattern intensifies against a normal of 130.215.
The read (direction and mechanism only; no price targets)
Chubu CDD +15.7 vs normal. Mechanism: aircon load. JEPX Chubu price-sensitive; JKM direction stays hedged (one JP area alone does not carry a national LNG-demand signal)
SetupKansai is riding a HEAT_SURGE regime driven by El Niño teleconnections (Nino3.4 +2.00) that are sustaining an anomalous Pacific High extension, suppressing monsoonal cloud cover and amplifying cooling-degree-day demand across western Japan. The zone's CDD15 anomaly of +36.3 above normal reflects persistently stalled baiu-front progression and clear-sky radiative heating.
EvolutionCDD15 strengthened from 154.25 to 176.75, widening the departure above the 140.495 normal and signaling model convergence toward sustained above-average cooling load through the forecast window.
The read (direction and mechanism only; no price targets)
Kansai CDD +19.9 vs normal. Mechanism: aircon load. JEPX Kansai price-sensitive; JKM direction stays hedged (one JP area alone does not carry a national LNG-demand signal)
🇦🇺 Australia
AEMO NEM, showing HDD this run (AEMO NEM news →)| Condition | Now | Trips at | Gap |
|---|---|---|---|
| SAM index (negative = mid-lat troughs reach southern AU) | 2.79 | -1.0 | 3.79 |
| gwHDD 15d vs normal (AU NEM basket) | -5.58 | 10.0 | -15.58 |
SetupNew South Wales heating demand runs 3.8 HDD above normal as a weak cross-Tasman frontal pulse maintains cooler conditions, even as the broader Australian regime remains benign with positive SAM (+2.79) typically suppressing southern cold incursions.
EvolutionHDD15 edged marginally lower from 88.4 to 88.05, converging toward the 84.245 normal but still elevated.
The read (direction and mechanism only; no price targets)
New South Wales HDD -2.9 vs normal; heating load tracking below normal, AEMO New South Wales demand softer
SetupQueensland's HDD15 sits 7.3 above normal at 48.3 as a cross-Tasman frontal passage delivers cooler air into the subtropics, countering the typical mid-winter baseline. The negative IOD (-0.33) and strongly positive SAM (+2.79) combination supports the cooler intrusion while suppressing any residual cooling demand.
EvolutionHeating demand eased run-to-run, with HDD15 declining from 55.25 to 48.3 yet remaining 7.3 above the 40.96 normal, signaling a converging but still-elevated trajectory.
The read (direction and mechanism only; no price targets)
Queensland HDD +5.7 vs normal. Mechanism: heating load. AEMO Queensland demand-side supportive this window
SetupVictoria's heating demand remains 9.3 HDD below normal as the positive SAM (+2.79) and negative IOD (-0.33) dipole steers frontal systems south of the state, maintaining mild mid-winter conditions across the southeast. The pattern holds Victoria and South Australia in a warmer-than-normal corridor while northern states see modest heating anomalies.
EvolutionRun-to-run stability with HDD15 unchanged at 111.2, locking the -9.3 anomaly in place and confirming persistent below-normal heating demand.
The read (direction and mechanism only; no price targets)
Victoria HDD -16.2 vs normal; heating load tracking below normal, AEMO Victoria demand softer
SetupSouth Australia's heating demand remains 9.5 HDD below normal as a positive SAM (+2.79) and negative IOD (-0.33) maintain a mild westerly flow that limits cold southerly incursions, keeping the zone in a benign mid-winter regime with suppressed degree-day accumulation.
EvolutionHDD15 dropped from 96.05 to 92.65, tracking further away from the normal of 102.145 and deepening the mild anomaly run-to-run.
The read (direction and mechanism only; no price targets)
South Australia HDD -8.5 vs normal; heating load tracking below normal, AEMO South Australia demand softer